Surface-dressing machine



F. POCHILA SURFACE DRESSING MACHINE Oct. 16 1923.

Filed June 8, 1921 2 Sheets-Sheet 1 Oct. 16, 1923.

' F. POCHILA suRr AcE DRESSING MACHINE Filed June 8. 1921 2 Sheets-Sheet2 V 50' terior end of which is threaded at 8f Patented on. 16, 1923.1

,UNITED STATES 1,470,641" ATENT OFFICE.

FRANZ roonILA, or nuoUEsNE, PENNSYLVANIA, ASSIGNOR or cits-Herr BABIG,or nuounsNn, PENNSYLVANIA.

TO' STEVEN sUnrrron-niinssme MACHINE.

Application filed June 8,

T all wkomit may concern '7 V I Be it known that I, F nA z POOHILA,'8,citizen of the"United States," residing at Duquesne, in'thecountyofAllegheny and.

State of Pennsylvania, have'invented certain new and usefullmprjovements inSur face-Dressing Machines, of which the fol V lowing isa specification.

This invention is foratool designed partic'ularly for dressing themanhole seats of water tube boilers and for dressing the portions'ofthe, manhole covers which-engage said seats, but which may also beuseful for I surface rather than by the useIof anabrasive device, as hasheretofore beenthe common practice, and to providea machine which "maybe interchangeably used on boilers or.

Son the manhole covers.

My invention is illustrated in the accent panying drawings, in which:

the machine; n h r M Fig; 2 is a section on line 11-11 of Fig. 1', l hFig. is a perspecti eview of the cutter feeding mechanism Fig. 4 isaside elevation showing the maa part of chine supported in a vise forfinishing mans hole covers, and showing the cutter turned toa differentposition; and

' line VI-VI of Fig. 6 is a section on Fig.1. p In the drawings, 5,indicates a supporting member having an offset portion 6 on which isformed an integral sleeve 7 ,the up er inn the inside of'thesleevemay beprovidedja bearing surface Rotatable within the sleeve is a shaftlOhaving its upper end shouldered at 11 and threaded at 12. Surround.

66 ing the upper end of the shaft lOis an exor out of the sleeve.

In a water tubeboiler, the boiler plates of the cut. in which a cutteris used for machining the Fig. l is a longitudinal section through '15and the inner face of the offset portion chine attached to the frontplate of a-boiler; F ig; 5 is a similar view showing the ma- 1921.seria1No.475,e7a Y ternally threaded bushing13, the threads of whichengage the threaded portion 8 of the sleeve. The. lower end .of thebushing-f1?) .bears'against shoulder 11 on the shaft 10. A spanner nut1e on the bushing provides a locking means therefor. A nut 12' isprovided. on the threaded end 125 'By proper adjustment of the lock nut14:, thebush if lng '13'may be turned to. move. the shaft in.

On the lower end of the shafts1Q' is a base" or. arm 15 havingguidemembersld (see f Fig. 6')"on the outer face thereof, forming a dove-tailchannel; :The outer end of'arm. 15 is bent to provide the laterallyextending portionl'l. I '1 Guided in the dove tail channel between 7members 16 is adovetailed block 18 which has a socket atll9 forremovably holding a i metal cuttingtoolQO. 'It will befseen that thesupporting member to regulatethe depth Extending into the end'rof theblo ck 18 opposite the end which carriesthe-cutter, is a threaded bore'21. Journaled in the "laterally extending portion 17 'of'arm 15 is athreaded end adapted a shaft 22 havin p v to projectinto tlie threadedbore 21: On the outer end of shaft22 is a star wheel 23. By turningthestar wheel 23, shaft 22may be rotated to reciprocate the'cutter'block '18..

Carried by the shaft 10 between the arm the outer'faceof the gear wheel24 and near the periphery thereof, is a pin 28 adapted toengage againstthe side of" arm 15 to re y tate said am and the shaft 10 when the gearwheel is rotated; 3

, For rotating the gear :wheel 2 1" there is provided ashaft 3Ojournaled in and passing through the portion 6 of supporting.

.. member '5, and journaled in bearing 31 supported in the sleeve- 7...'A crank 32 is secured to'the outer end of shaftSO. To the which engagesa. second pinion'ilt carried on' stub shaft 35' and which-meshes withgear wheel 2%. Thus, the gearwheel and inner end of the shaft-isfixedapinionl33 f J 'llt) a cutter', a gear wheel surrounding the spin-.dle havingan abutment for turning the head,

intermeshing gearing rotatably mounted in the oifset portion and adriving shaft for one of said gears extendingoutwardly par and providedwith a,

' at each revolutionrof the head to move the cutter holder. is

allel with the spindle crank handle. I

8. In a finishing tool of the class described, the combination of a basemember having a 10 fiat clamping portion and an integral ofiset portionhaving a spindle sleeve at right angles thereto, a spindle thereinprovided with a revolving head, a cutter holder slidably. I

mounted in the head and provided with a cutter, an adjusting screwtherefor mounted in the revolving head and having'a terminal star Wheel,and an abutment on thebase member adapted to engage the star wheel FRA ZrooinLA.

